block merging if PR has a 'blocked:' label

.github/mergify.yml

@@ -28,6 +28,7 @@ pull_request_rules:
       - label=merge me
       - label=merge delay passed
       - '#approved-reviews-by>=2'
+      - '-label~=^blocked:'
 
   # merge+squash strategy
   - actions:
@@ -39,6 +40,7 @@ pull_request_rules:
       - label=squash+merge me
       - label=merge delay passed
       - '#approved-reviews-by>=2'
+      - '-label~=^blocked:'
 
   # merge+no rebase strategy
   - actions:
@@ -50,6 +52,7 @@ pull_request_rules:
       - label=merge+no rebase
       - label=merge delay passed
       - '#approved-reviews-by>=2'
+      - '-label~=^blocked:'
 
   # merge strategy for release branches
   - actions:
@@ -65,6 +68,7 @@ pull_request_rules:
       - base!=master
       - -body~=backport
       - '#approved-reviews-by>=2'
+      - '-label~=^blocked:'
 
   # merge+squash strategy for release branches
   - actions:
@@ -80,6 +84,7 @@ pull_request_rules:
       - label=squash+merge me
       - -body~=backport
       - '#approved-reviews-by>=2'
+      - '-label~=^blocked:'
 
   # merge strategy for backports: require 1 approver instead of 2
   - actions:
@@ -92,6 +97,7 @@ pull_request_rules:
       - base!=master
       - body~=backport
       - '#approved-reviews-by>=1'
+      - '-label~=^blocked:'
 
   # merge+squash strategy for backports: require 1 approver instead of 2
   - actions:
@@ -103,6 +109,7 @@ pull_request_rules:
       - base!=master
       - body~=backport
       - '#approved-reviews-by>=1'
+      - '-label~=^blocked:'
 
   # backports should be labeled as such
   - actions: